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$154+ Cheap flights from Ontario to Billings (ONT - BIL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
1 adult, Economy
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Cheap flight deals from Ontario to Billings

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Billings (BIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 19, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$232
(Delta)

One-way from

$154
(Alaska Airlines)

Popular in

March

Cheapest in

January

Average price

$341
Provider with most accurate pricing for Ontario-Billings Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Ontario-Billings Logan Intl flights.
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From Ontario to Billings Logan Intl
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One-way flight from Ontario to Billings Logan Intl
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Highest demand for flights based on searches. 21% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Ontario to Billings

Cheapest flights from Ontario to Billings
Explore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 19, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:00 amONT - BIL
1 stop17h 08mAlaska Airlines
Fri 12/122:02 pmBIL - ONT
1 stop22h 17mAlaska Airlines
Deal found 11/18$318
This Alaska Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:13 pmONT - BIL
1 stop10h 55mAlaska Airlines
Thu 12/113:36 pmBIL - ONT
1 stop5h 27mAlaska Airlines
Deal found 11/18$337
This Alaska Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:10 amONT - BIL
1 stop5h 12mAlaska Airlines
Thu 12/113:36 pmBIL - ONT
1 stop5h 27mAlaska Airlines
Deal found 11/18$340
This KAYAK deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:10 amONT - BIL
1 stop5h 12mAlaska Airlines
Sun 12/76:00 amBIL - ONT
1 stop6h 19mAlaska Airlines
Deal found 11/18$378
This Delta deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:49 pmONT - BIL
1 stop6h 34mDelta
Sat 12/611:47 amBIL - ONT
1 stop5h 22mDelta
Deal found 11/17$391
This Trip.com deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:30 amONT - BIL
1 stop7h 12mMultiple Airlines
Sun 11/305:47 pmBIL - ONT
1 stop21h 39mMultiple Airlines
Deal found 11/17$407
This Trip.com deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:30 amONT - BIL
1 stop7h 12mMultiple Airlines
Mon 12/19:55 amBIL - ONT
1 stop12h 11mMultiple Airlines
Deal found 11/17$429
This American Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/29:59 amONT - BIL
2 stops10h 16mAmerican Airlines
Sat 12/65:10 amBIL - ONT
2 stops11h 52mAmerican Airlines
Deal found 11/17$451

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Billings that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 19, 2025.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.

Fly from

Ontario

Fly to

Billings

Route

Depart

Return

Price

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 1/7

6:00 am-11:06 am

1 stop4h 06m

Billings Logan Intl

Sun 1/11

6:10 pm-10:51 pm

2 stops29h 41m

$232

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 2/2

5:10 pm-10:31 pm

1 stop4h 21m

Billings Logan Intl

Wed 2/25

11:49 am-4:04 pm

1 stop5h 15m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 2/4

5:10 pm-10:31 pm

1 stop4h 21m

Billings Logan Intl

Tue 2/24

6:07 pm-11:53 pm

1 stop6h 46m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 2/3

5:10 pm-10:31 pm

1 stop4h 21m

Billings Logan Intl

Wed 2/25

11:49 am-4:04 pm

1 stop5h 15m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Thu 2/5

6:00 am-11:06 am

1 stop4h 06m

Billings Logan Intl

Wed 2/25

11:49 am-4:04 pm

1 stop5h 15m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 2/2

5:10 pm-10:31 pm

1 stop4h 21m

Billings Logan Intl

Tue 2/24

6:07 pm-11:53 pm

1 stop6h 46m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Thu 2/5

6:00 am-11:06 am

1 stop4h 06m

Billings Logan Intl

Tue 2/24

6:07 pm-11:53 pm

1 stop6h 46m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 2/4

5:10 pm-10:31 pm

1 stop4h 21m

Billings Logan Intl

Wed 2/25

11:49 am-4:04 pm

1 stop5h 15m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 1/31

4:03 pm-11:36 pm

1 stop6h 33m

Billings Logan Intl

Tue 2/24

7:00 am-10:44 pm

1 stop16h 44m

$242

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 1/31

4:03 pm-11:36 pm

1 stop6h 33m

Billings Logan Intl

Sat 2/21

2:04 pm-11:32 pm

1 stop10h 28m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 18 results
1
2

Compare providers for flights from Ontario to Billings

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Billings in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Billings flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Billings flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Billings flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Billings flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Billings flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Billings

Have a flexible travel schedule? Discover the best time to fly to Billings from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Billings

What is the cheapest month to book a flight from Ontario to Billings?

Currently, August is the cheapest month in which you can book a flight from Ontario to Billings (average of $116). Flying from Ontario to Billings in April is currently the most expensive (average of $253). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to BIL?

Find hourly flight availability from Ontario to Billings. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 19, 2025.

One of the essential ways to save on airfare from Ontario to Billings is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 30% on airfare.

Reviews of airlines servicing Billings

Get insights into the airlines that provide service to Billings. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Billings. Reviews last updated November 19, 2025.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,318 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,318 reviews
Alaska Airlines
8.0
Very good
11,318 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
7.9
Good
8,002 reviews
Alaska Airlines
8.0
Very good
11,318 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
9,019 reviews
Alaska Airlines
8.0
Very good
11,318 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Billings?

    Departing from Ontario to Billings will take you 4h 06m. The distance from Ontario to Billings is about 941 mi.

  • What are the cheapest airlines flying from Ontario to Billings round-trip?

    Currently priced at $245, Delta will fly you from Ontario to Billings and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Alaska Airlines - these airlines can fly you to your destination from $270 and $284, respectively. Delta is currently priced 37% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Ontario to Billings one-way?

    The cheapest airlines for a one-way flight from Ontario to Billings are Alaska Airlines ($154), Delta ($155), and United Airlines ($331).

  • Can I find deals for flights from Ontario to Billings that include hotel bookings?

    Yes. In addition to deals on Ontario to Billings flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Billings?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Billings.

  • Can I find deals for business class flights from Ontario to Billings?

    Yes. Cheapflights offers flight deals from Ontario to Billings by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Billings?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Billings (average of $116). Flying from Ontario to Billings in April is currently the most expensive (average of $253). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 3 airlines flying from Ontario to Billings

Discover the top 3 airlines that operate flights from Ontario to Billings. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$245Average$328FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$270Average$507FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$284Average$402FlexibilityNo cancel feeOn-time75%

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